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Butterfly Valve

The valve body and valve plate of HG8601 series butterfly valve are both manufactured using steel plate through welding technique. Thus, the steel valve comes with advantages such as compact structure, small size, light weight, small friction resistance, small return difference, etc.

The butterfly valve can be fitted with either pneumatic or electric actuator to meet individual demands. It is ideal for applications where requires large caliber, large flow, low differential pressure and low requirement on leakage rate. For occasions with high requirement on leakage rate, please choose our actuated butterfly valves with flexible seal.

Main Technical Specifications
Nominal diameter (mm) 80 100 125 150 200 250 300 350 400 450 500
Flow coefficient
Kv
90 ° 275 480 770 1100 1970 3000 4460 5840 7720 9440 12000
60 ° 136 239 365 525 890 1460 2130 2830 3730 4270 5840
Nominal diameter (mm) 600 700 800 900 1000 1200 1300 1500 1600 1800 2000
Flow coefficient
Kv
90 ° 1760 24000 31200 39400 48900 69500 81500 107300 126000 159000 197200
60 ° 8410 12000 14800 19700 23200 33900 39500 52300 61100 77200 95600
Rated stroke Flow regulation applications: 70°; two position control applications: 90°
Flow characteristic Approximate to equal percent
Nominal pressure 0.6, 1.0, 1.6 MPa
Adjustement range 70° 12:1;
90° 30:1
Action form Pneumatic or electric
Flange HG20592-2009, ANSI, JIS, DIN, etc.
Materials, Working Temperature and Leakage Rate
Valve body material Cast steel, stainless steel (SS304, SS316, SS316L)
Valve plate material Stainless steel (SS304, SS316, SS316L)
Stuffing material Teflon, flexible graphite
Sealing form Flexible seal Rigid seal
Sealing material Nitrile rubber Fluororubber Teflon Teflon reinforced by carbon fiber Stainless steel or stainless steel + stellite alloys
Leakage rate Class VI
< 10-4 rated flow
< 2% rated flow
Working temperature Cast steel valve body -5 ~ 80 ℃ -5 ~ 200 ℃ -5 ~ 200 ℃ -5 ~ 220 ℃ -5 ~ 400 ℃ High temperature resistant alloy: 1000 ℃
Stainless steel valve body -20 ~ 80 ℃ -20~ 200 ℃ -20~ 200 ℃ -20 ~ 220 ℃ -20 ~ 600 ℃
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